Mentha arvensis, ext.

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Remarks:

reliability 2 because of low accuracy using distillation method

Reason / purpose for cross-reference:

reference to same study

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

Principles of method if other than guideline:

200 ml (178.0 g) of sample were heated by means of a hemispherical heating mantle. Bottom and head temperatures and amount of distillate were read and correlated to the distillation time to develop a distillation curve diagram.

The boiling point of an essential oil is not a sharply defined characteristic because it is a mixture of substances in variable concentrations. Therefore the temperature at which the natural complex substance (NCS) begins to boil under normal atmospheric pressure shall be determined. The determined boiling point under these conditions for Cornmint Oil is 102 ± 10 °C. The low value for initial boiling point maybe due to a combination of minor componenets and dissolved water typically present in this material. The head temperature quickly rose to typical figures expected for main components. The determined temperature for the beginning of boiling is reasonable from the constituent view.

GLP compliance:

not specified

Type of method:

distillation method

Key result

Boiling pt.:

102 °C

Atm. press.:

1 Bar

Remarks on result:

other: First distillate was obtained at this temperature; standard deviation is 10 degrees Celsius

Detailed results, see also attached distillation curve.

Time (h)	Bottom Temperature (°C)	Head Temperature (°C)	Amount of Distillate (g)	Amount of Distillate (%)	Comments
00:00	20	21.2	0.0	0.0
00:04	40	21.4	0.0	0.0
00:09	72	21.6	0.0	0.0
00:14	107	22.0	0.0	0.0
00:19	147	22.0	0.0	0.0
00:21	155	22.8	0.0	0.0	start of boiling
00:22	167	21.8	0.0	0.0
00:23	180	21.8	0.0	0.0
00:24	192	22.0	0.0	0.0
00:25	201	22.0	0.0	0.0
00:26	201	59.5	0.0	0.0
00:27	203	93.0	0.0	0.0
00:28	205	102	1.1	0.6	first distillate
00:29	205	129.0	4.0	2.2
00:30	207	160.0	10.3	5.7
00:31	208	185.0	17.1	9.5
00:32	210	190.0	22.4	12.5
00:33	210	192.0	27.2	15.2
00:34	210	199.0	32.0	17.9
00:35	215	200.0	37.5	21.0
00:36	215	200.0	41.9	23.5
00:37	215	201.9	45.6	25.6
00:38	215	201.8	48.2	27.1

Conclusions:

The boiling point of cornmint oil is 102 degrees Celsius.

Executive summary:

The boiling point of cornmint oil was determined according to methodology comparable to OECD guideline 103 using the distillation method. The boiling point was found to be 102 +/- 10 degrees Celsius.

Description of key information

102 degrees Celsius

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

102 °C

Additional information

The boiling point of cornmint oil was determined according to methodology comparable to OECD guideline 103 using the distillation method. The boiling point was found to be 102 +/- 10 degrees Celsius.